[PATCH] common: pe: fix pe reloc pointer overrun

[Sascha Hauer]

On Thu, 27 Mar 2025 08:50:36 +0100, Ahmad Fatoum wrote:
> Import the fix from U-Boot commit 463e4e6476299b32452a8a:
> 
> | Author:     Aleksandar Gerasimovski <Aleksandar.Gerasimovski at belden.com>
> | AuthorDate: Fri Nov 29 21:09:44 2024 +0000
> |
> | efi_loader: fix pe reloc pointer overrun
> |
> | The fix provided by 997fc12ec91 is actually introducing
> | a buffer overrun, and the overrun is effective if the
> | memory after the reloc section is not zeroed.
> | Probably that's why this bug is not always noticeable.
> |
> | The problem is that 8-bytes 'rel' pointer can be 4-bytes aligned
> | according to the PE Format, so the actual relocate function can
> | take values after the reloc section.
> |
> | One example is the following dump from the reloc section:
> |
> |     bce26000: 3000 0000 000c 0000 0000 0000 0000 0000
> |     bce26010: 7c00 9340 67e0 f900 1c00 0ea1 a400 0f20
> |
> | This section has two relocations at offset bce26008 and bce2600a,
> | however the given size (rel_size) for this relocation is 16-bytes
> | and this is coming form the efi image Misc.VirtualSize, so in this
> | case the 'reloc' pointer ends at affset bce2600c and is taken as
> | valid and this is where the overflow is.
> |
> | In our system we see this problem when we are starting the
> | Boot Guard efi image.
> |
> | This patch is fixing the overrun while preserving the fix done
> | by 997fc12ec91.
> | Signed-off-by: Aleksandar Gerasimovski <aleksandar.gerasimovski at belden.com>
> | Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> 
> [...]

Applied, thanks!

[1/1] common: pe: fix pe reloc pointer overrun
      https://git.pengutronix.de/cgit/barebox/commit/?id=d4b5f3d3d191 (link may not be stable)

Best regards,
-- 
Sascha Hauer <s.hauer at pengutronix.de>